Regulating gear



June 26, 1923.

E. scHRinER 'REGULATING GEAR Filed Aug. 24. 1921 uw f/z/ 706 Edwardfic/ra 'der fZZ/Q Patented June 26, 1923.

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EDMUND SGERGDER, 0F BERLIN, GERMANY.

REGULATING GEAR.

Application filed August 24, 1921. Serial No. 495,146.

To all whom it may concern:

Be it known that I, EDMUND SoHRonnR, a citizen of the German'Republic,and residing at Nos. 48-51 Maybach-Ufer, Berlin, Germany, have inventedcertain new and useful Improvements in Regulating Gears, of which thefollowing is, a specification,

This invention relates to a planet-wheel changespeed gear and is soconstructed as to permit of being employed as a changespeed gear, itsparticular effect being that variations in the number of revolutions ofa driving shaft are transmitted to a driven shaft coupled with the gearonly in a reduced measure. This is important for purposes where thenumber of revolutions of a shaft shall be as uniform as possible andwhere perfect uniformity of the driving motor cannot be attained withcomplete dependableness.

My invention is illustrated by way of example in the accompanyingdrawing in which Figure 1 is an axial section through a gear constructedaccording to this invention, and Figure 2 is a plan of the same.

Z) is a member of the planet-wheel gear; it is its driving wheel whichis secured to the driving shaft 6'. c and d are the planet wheels ofthis gear. The planet-wheels are bevel-wheels in the instance shownattached to a carrier m, and encompassed by a band m to which is affixedan angular arm cl forming at its end a bearing for a worm 7' whichmeshes with a stationary worm-wheel e held by an angular supportingmember 6' and arranged co-axially with the planetwheel gear.

Afiixed to the band m is also an arm 2 arranged at 90 with respect tothe arm cl and extending to the other side of the planetwheel gear. Thefree end of this arm has attached to it a bearing'y located oppositelyto a sleeve 'w arranged upon the shaft a and supporting together withsaid sleeve a shaft 92 to which is secured a friction wheel 1'contacting with the gear-wheel a, as well as with a friction disk jafiixed to the shaft a.

The carrier 12?. of the planet-wheels is rotatably supported upon theshaft 6.

The worm f is aflixed to a shaft 9 having at its outer end a chain-wheelg connected by a chain 9 with another chain-wheel g secured to the outerend of the shaft w. The parts 9 g g may be replaced, of course byequivalent means, such, for instance, as pulleys and a belt, orrope-pulleys and a rope, or the like.

The manner of operation of the gear is as follows:

Supposing, the directions of rotation of the shafts a and Rare thoseindicated by the arrows II and I, the arrow 1. indicating the directionof the drivingshaft and the arrow II indicating the direction of thedriven shaftpand supposing further, that the arrow III indicates thedirection of rotation of the planet-wheelcarrier and the arrow IVindicates the direction of rotation of the shaft 00 with the'frietionwheel '5.

At a certain distinct number of revolutions of the shaft a the disk 2'is rotated in the direction of the arrow IV with a certain number ofrevolutions determined by its position relatively to the disk y'. At thesame time the worm f is rotated with the same number of revolutions asthat of the disk i and its shaft so by the mediation of the transmittingmembers 9 g g 9 The worm f which meshes with the worm-wheel 6 moves thusslowly around the latter, and as it is firmly connected with theplanet-wheel carrier on by the arm (5 and the band m the carrier m isturned in the direction of the arrow III. Owing to this rotation, thenumber of revolutions of the driven shaft a is reduced to a number orlimit determined by the position of the disk 2'. If the number ofrevolutions of the driving shaft 1) increases, also the shaft a tends torotate with an increased speed, but as then also the disk 2' is rotatedcorrespondingly quicker, the planet-wheel carrier, too, turns with agreater speed, viz. in the direction of the arrow III and by reason ofthe action of the disk 2' upon the transmitting members m g g g g 7 (Zm, in consequence of which the number of revolutions of the shaft a isdecreased.

It is obvious that variations in the number of revolutions of the shaft6' are transmitted to the shaft (1. only in a greatly reduced measure.If, for instance, the number of revolutions of the shaft 5 would bedoubled, theiirst tendency of the mechanism would be to double thenumber of revolutions also of the shaft a and of the disks 7' and i, aswell as of the transmitting members m g g g g and 7 and as the disk 2'rotates not only with its own shaft m, but also around the shaft (1, thetendency of the retating members is to increase the number ofrevolutions of the disk 2'. I diminution of the number of revolutions ofthe shaft 41/.

If, however, the numberof'rerolirtions'of the shaft 6 is diminished, theeffect is the reverse. Thus, even a strongly ununiformly running drivingshaft 1) will produce a nearly uniform rotation ofthe driven shaft a,ifa mechanism of the kind described is inserted b'etweenthe two shafts.The revolutions of the driven shaft may be rendered still more'uniform,to any desired degree, by arranging two or more such gears in a series,as will b clear without entering into the details'of such an arrangementand combination of parts.

I claim:

A planet wheelchange-speed gear, comprising, in combination; aplanet-wheel gear composed of two co-axial wheels, tivo planetwheelslocated oppositely to each other between'said co-aXial wheels andmeshing with them and of a planet-wheel carrier loosely rotatablebetweenthe coaxial wheels; a sta- The result is ationary worm-wheel arranged atthe free side of one of the said co-axial wheels; a worm meshing withsaid Worm-wheel and being supported by the planet-wheel carrier; a shaftipassing through the worm- Wheel and having the adjacent co-axial wheelsecured to it and supporting the planetwheel carrier; another shaftarranged coaxially to the former and having the other co-axial Wheelaffixed to it; a friction disk also affixed to said latter shaft atsomedistance from the respective co-axial wheel; another friction disklocated between'this wheel and the first-mentioned friction disk atright angles to both; a shaft having said other disk secured to it ashaft having the said Worm ailixed to it and extendingtparallelly to theshaft of the last-mentioned disk; and means for transmitting rotarymotion from the disk shaft to the Worm shaft, substantially as setforth. r

In witnesswhereof I have hereunto set my hand.

' EDMUND soHRoDER.

